/Engine/Source/Runtime/Slate/Public/Framework/Docking/LayoutExtender.h
Populate the specified container with the tabs that relate to the specified tab ID
template<typename AllocatorType> void FindTabExtensions ( [FTabId](API\Runtime\Slate\Framework\Docking\FTabId) TabId, ELayoutExtensionPosition Position, [TArray](API\Runtime\Core\Containers\TArray)< [FTabManager::FTab](API\Runtime\Slate\Framework\Docking\FTabManager\FTab), AllocatorType > & OutValues ) const